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# Train A travelling at 75 mph leaves Sunniville for

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Train A travelling at 75 mph leaves Sunniville for [#permalink]

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14 Jan 2004, 15:25
This topic is locked. If you want to discuss this question please re-post it in the respective forum.

Train A travelling at 75 mph leaves Sunniville for Gloomyville at 4pm. Train B travelling at 120 mph also leaves Sunniville for Gloomyville at 7pm. Train C leaves Gloomyville for Sunniville at 5pm. If all three trains meet at the same time between Sunniville and Gloomyville, what is the speed of Train C if the distance between Gloomyville and Sunniville is 1160 miles?

a. 90 mph
b. 112
c. 70
d. 80
e. 60
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14 Jan 2004, 16:22
d. 80

Train B will meet A after 5 hours of its journey. By that time the total distance travelled by A and B will be 600 miles. As train C comes from the other direction it takes 7 hours for 560 (1160-600) miles.
14 Jan 2004, 16:22
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